Nud4301 Led Driver Demonstration Board

The NUD4301 demo board is a simple circuit which
biases the NUD4301 device so that it's functionality CAN
easily be observed. It contains two low power resistors of
4.7 to set the current limit (ILimit) to 20 mA typical and
two small capacitors C1, C2 (1 f, 1 V) that prevents noise
from entering to the Isense circuit. The two resistors CAN be
changed to program different current limits for different
applications needs (for more details about the resistor
calculation for different LED currents, please refer to the
device's datasheet). The demo board also contains two white
LEDs with forward voltage between 3.2 V and 3.4 V at
20 mA. These two LEDs are optional and CAN be replaced
with other types for evaluation purposes.
The demo board is set to operate for an input voltage
between 3.2 and 6 Vdc and with a current limit of 20 mA
typical (4.7 ) for both channels. The Dim and enable pins
are connected to Vcc through removable jumpers which CAN
be opened to apply external enable and PWM signals